Pythagorean:

PM2 2*ln(3)    * 12/ln(2) =  38.039100 -> +160
PM3 4*ln(3)    * 12/ln(2) =  76.078200 -> +320
P+4 6*ln(3)    * 12/ln(2) = 114.117300 -> +480
 P5   ln(3)    * 12/ln(2) =  19.019550 -> + 80    (80.08)
PM6 3*ln(3)    * 12/ln(2) =  57.058650 -> +240
PM7 5*ln(3)    * 12/ln(2) =  95.097750 -> +400

Just:

 M2   ln(5/9)  * 12/ln(2) = -10.175963 -> -721
 M3   ln(5)    * 12/ln(2) =  27.863137 -> -561  (-560.59)
 +4   ln(5*9)  * 12/ln(2) =  65.902237 -> -400
 M6   ln(5/3)  * 12/ln(2) =   8.843587 -> -641
 M7   ln(5*3)  * 12/ln(2) =  46.882687 -> -481

nudge ln(81/5) * 12/ln(2) =  48.215063 -> +881   (880.90)

Svan:

sm2 ln(3**7/125)*12/ln(2) =  49.547439 -> +2242
 M2
sm3 ln(3**5/25)* 12/ln(2) =  39.371476 -> +1521
sM3 2*ln(5/9)  * 12/ln(2) = -20.351926 -> -1441
sP4   ln(27/5) * 12/ln(2) =  29.195513 -> + 801
s+4 3*ln(5/9)  * 12/ln(2) = -30.527889 -> -2162
s-5 ln(9**5/5**4)*12/ln(2)=  78.742952 -> +3043
 P5
sm6 ln(9**4/125)*12/ln(2) =  68.566989 -> +2322
 M6
sm7 ln(9**3/25)* 12/ln(2) =  58.391026 -> +1602
sM7   ln(25/27)* 12/ln(2) =  -1.332376 -> -1361
sP8   ln(81/5) * 12/ln(2) =  48.215063 -> + 881

ln(256/243) / ln(81/80) = 4.2 nudges per Pythagorean    half-step
ln(2)/12    / ln(81/80) = 4.6 nudges per equal-tempered half-step
ln(9/8)/2   / ln(81/80) = 4.7 nudges per Pythagorean    half whole-step
ln(16/15)   / ln(81/80) = 5.2 nudges per just-tuned     half-step
ln(2187/2000)/ln(81/80) = 7.2 nudges per Svan-tuned     half-step

Dropping rounded fractions for equal spacing:

    Pyth/just          Svan              ----Svan scale----
A       0      C   + 881    0    A       G  +1602  +2323 F
G#  +400/-481  B   -1362  -2243  G#      F# - 641  +  80 E
G   -160/+721  Bb  +1602  + 721  G       F  +2323  +3044 Eb
F#  +240/-641  A   - 641  -1522  F#      E  +  80  + 801 D
F   -320/+561  Ab  +2323  +1422  F       D# -2163  -1442 C#
E      +80     G   +  80  - 801  E#      D  - 801  -  80 C
Eb  -480/+401  Gb  +3044  +2163  Eb      C# -1442  - 721 B
D#  +480/-401  F#  -2163  -3044  D#      C  +1522  +2243 Bb
D      -80     F   + 801  -  80  D       B  - 721    0   A
C#  +320/-561  E   -1442  -2323  C#      Bb +2243  +2964 Ab
C   -240/+641  Eb  +1522  + 641  C       A    0    + 721 G
B   +160/-721  D   - 721  -1602  B       G  + 721  +1442 F
Bb  -400/+481  Db  +2243  +1362  Bb      F  +1442  +2163 Eb
A       0      C     0    - 881  A       E  - 801  -  80 D